Shape key animation applies to all animation actions, how do I only apply it to one?
I think you will need a different shape key animation for every action. To simplify this you can copy the shape key you already have.
It's sometimes hard to notice but you have to click the little downward pointing &quot;&gt;&quot; icon. Make sure you have only the correct shape key activated by having its checkbox checked, and having the other shape keys unchecked (since the new shape key will be a combination of all the activated shape keys). Then have the Value set to the correct value (in this case 1), and then choose New Shape From Mix.